For a given signal constellation, the average probability of symbol error incurred in maximum likelihood signal detection over an AWGN channel is invariant to the _________________ of the signal constellation.
A: compression
B: translation
C: expansion
D: rotation
A: compression
B: translation
C: expansion
D: rotation
举一反三
- _____, the train started. A: The signal given B: Giving the signal C: The signal being given D: The signal giving
- ________, the train started. A: The signal given B: After the signal was given C: Given the signal D: A and B
- A ________may be given ____means of flags, lights, and guns. A: sign; by B: signal; in C: signal; by D: sign; in
- translation: Digital Signal Processing ______________________________________________
- In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（） A: the signal to noise of the current optical amplifier B: the signal to noise of the previous amplifier or source C: the signal to noise introduced by the optical multiplexer D: the accumulated noise to signal ratio of the optical channel